Molding-machine



H. P. BOOTH.

MOLDING MACHINE.

APPLICATION FILED rms, 1920.

'Emma Feb. 15.1921.

HOWARD PEARSON BOOTH, OF MONTREAL, QUEBEC, CANADA.

MODDING-MACHINE.

Specification of Letters Patent.

Patented Feb. 15, 1921.

Application filed February 3, 1920. Serial No. 356,060.

To all whom t may concer/n,

Be it known that I, HOWARD PEARsoN BOOTH, a subject of the King of Great Britain, and residing at 881 Durocher street, in the city and district of Montreal, in the Province of Quebec, in the Dominion of Canada, have invented a new and useful Molding Device, ofwhich the following is the specication.

rlhe invention relates to a molding device as described in the present specification and illustrated in the accompanying drawings that form part of the same.

The invention consists essentially in the novel means employed for holding and releasing the flask from the pattern table, whereby said ask is held in a rigid position continuously during the vibratory movements incident to settling the sand.

The objects of the invention are t0 e1irninate the loosening of the ask fastenings and thereby avoid losses in casting operations; to economize in the matter of plant in foundry work; to increase the production in large manufacturing establishments and generally to provide a simple and effective means for holding the iask in position that will materially facilitate the operations of the foundry. Y

In the drawings, Figure 1 is a perspective view of the pattern table, showing the flask secured thereto and the means employed for holding said flask.

Fig. 2 is a plan view showing the parts of the flask holding device, apart from the table.

Fig. 3 is a perspective detail of a wedge bar.

Fig. 4 is a perspective detail of a wedge bar of reduced size adapted to replace the larger bar under certain conditions.

Fig. 5 is a perspective detail of the eye clamp.

Fig. 6 is a equalizing link.

Fig. 7 is a perspective detail of one of the crank levers used in operating the wedge locking bolts.

Fig. 8 is a perspective detail of one of the links connecting the crank levers to the locking bolts.

Like numerals of reference indicate corresponding parts in each figure.

Referring to the drawings, 1 indicates the molding board or pattern table, which is shown here with the cross pieces 2 and on perspective detail of the these cross pieces the plate 3 is mounted having the various reinforcing ribs 4 between which an air cylinder 5 is secured. This cylinder is formed with the air ports 6 and 7 at the ends respectively, and within the cylinder the piston 8 reciprocates.

The piston rod 9 projects outwardly from the piston through one head of the cylinder and is pivotally joined to an equalizing link 10. The equalizing link 10 at both ends is slotted and pivotally joined to the crank levers 11 and 12. The latter are pivoted at their angles.l3 and 14 and the other sections of the said crank levers carry at their ends the pivoted links 15 and 16. The links 15 and 16 are pivotally joined to the wedge locking bolts 17 and 18 transversely sliding in the guide slots 19 on tothe face plates'20. The face platesy 20 extend over the edge of the plate 3 of the molding board 1 and are slotted at 21 in said extensions.

rllhe eye clamps 22 have slotted shanks 23 which extend through the slots 21 and are engaged by the wedge locking bolts 17 and 18. The eye portions 24 of the eye clamps 22 engage the trunnions 25 extending from the flask 26 and the wedge locking bolts extending into the Shanks 23 draw the flask 26 closely to the molding board or pattern table 1.

The air ports 6 and are connected by the pipes 27 and 28 to a suitable air supply and the air to the cylinder is controlled by the valves 29 and 30.

In the modern methods of molding, it is customary to settle the sand about the pattern and generally to prepare everything by machinery, therefore the pattern table or molding board with the lask thereon filled -with sand around the pattern is subjected to severe vibratory movements, and in the usual shop terms it is j olted so considerably that the sand becomes very solid about the pattern. In this operation it is very desirable that the flask shall be held as of one piece with the'table or board, therefore the air pressure is turned on the piston in the cylinder, which shoots the wedge locking bolts into the slotted Shanks of the eye clamps, and this pressure is maintained during the jolting operations, consequently as there is continuous pressure behind the bolts,

'the only change in regard to the holding of the flask to the board is to increase the rigidity of the connection, consequently the sand will settle permanently into its position Y shown in F 1g. 1, the bolts are released by allowing pressure on the other side of the piston and this means that the pattern board may be readily removed from the flask and the latter with the sandl therein is then ready for the customary molding operations.

Various changes may be made in the details of the construction Without departing from the spirit of the invention, and so long as these changes are within the scope of the claims for novelty following, the protection accorded shall not be invalidated.

What I claim is v Y l. In a molding device, a flask, a pattern board, a cylinder suitably mounted on said lpattern board and a piston operating therein, said cylinder being connected to a suitable expansile fluid supply, clamps engag- Y ing said lask'from said' pattern board and l Wedge bars pivotally connected With said piston and engaging said clamps.

2. VIn a molding' device, a lask, a pattern board, a plate mounted on said 'pattern board, acylinder mounted on said plate and connected from each end to an eXpansile Y fluid supply, a piston operating in said cylinder, clamps engaging said'askrfrom said plate, Wedge-shaped bars .engaging said clamps, and a piston rod from said piston pivotally connected through a toggle mech-V anism to said bars and operating the same by the movement of said piston. l

3. In a molding device, a flask having trunnions extending therefromfa pattern board, a base plate mounted on said pattern board having face plate extensions therefrom and vslots in saidface plates in aline- Inent With said trunnions, eye Aclamps engaging said trunnions and having slotted Shanks extending through saidV face plate slots, Wedge locking boltssliding into said shank slots, cra-nk levers 'pivoted' at theirl -V angles onfsaid base plate `andr'fleXibly conf nected to said locking bolts, an air cylinder and a piston operating therein, a pistonrod -from said piston flexibly connected to said crank levers and 'feed pipesV connected'to a suitableair supplyand leading tothe ends of the cylinder respectively. Y

VSigned at he'city of MontrealyProvinee of Quebec, Dominion of Canada, this 30thY Y day of January, 1920.

i HOWARD manson Booirri.` 

